Function notation is a way to name a
function that is defined by an equation. For an equation in x
and y, the symbol f (x) replaces y and is read as "the value
of f at x" or simply as "f of x."
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7.6943 = 76943/10000
The answer to 7.9*10^-6 - 7.9*10^-6 is 0 and that does not need any other notational embellishment.
Not every relation is a function. But every function is a relation. Function is just a part of relation.
The cubic function.
Range